Property Data Quality
Detailed view of property data quality metrics.
Total Properties
Full PAF Matches
Plot Matches
Medium Confidence PAF
Not PAF Matched
Address Quality Overview
Last updated: September 2025
PAF Match Quality
Full PAF Matches
Complete address validation
203,711
93.9%
Medium Confidence
Partial address validation
6,977
3.2%
Not PAF Matched
No validation available
6,121
2.8%
Special Property Types
Plot Matches
New build developments
(From last PAF matching run)
79
0.04%
Quality Score Breakdown
About UPRN and UDPRN
UPRN (Unique Property Reference Number) is an authoritative code from Ordnance Survey that provides a unique identifier for every addressable location in Great Britain. UPRNs enable precise property identification and are essential for accurate address matching, reducing ambiguity in property records and improving data quality across government systems.
UDPRN (Unique Delivery Point Reference Number) is an authoritative code from Post Office Postal Address File (PAF) that provides a unique code for all letter boxes in the UK UDPRNs ensure that all letters are delivered to the correct address. Note that some properties only have one UDPRN, but may have multiple sub-divided properties.
Address Quality Trends
PAF Match Distribution
Property Data Quality Issues
New Build Address Validation
Some new build properties lack complete PAF validation due to no mapping from plot to revised address
Suggestion: Update the Not Yet Built data and execute a new PAF matching run - any unmatched files should be sampled for review
Postcode Formatting Issues
Legacy data contains inconsistent postcode formats affecting validation
Suggestion: Use improved matching rules to increase match rate, but sample results for accuracy